cat integer REFERENCES word (id),
ref integer REFERENCES word (id),
prio smallint DEFAULT '1'
CHECK (prio >= 0 OR ref IS NOT NULL),
grade integer,
cover boolean NOT NULL DEFAULT FALSE,
cat integer REFERENCES word (id),
ref integer REFERENCES word (id),
prio smallint DEFAULT '1'
CHECK (prio >= 0 OR ref IS NOT NULL),
grade integer,
cover boolean NOT NULL DEFAULT FALSE,